Hack Correlation

This project is taking longer than anticipated even though it was supposed to be something simple. I will publish a schematic of the complete circuit in the near future (this year) but in the meantime there is still the slow process of troubleshooting. Safety considerations: the complete circuit is not isolated from mains so testing is pretty critical. I have been feeding 3.6V to test the low-voltage part but in the end it will have to be hooked up to 220V the boiler / water heater can only take a limited amount of pressure. If the thermistor is not properly calibrated in software there is the risk of a scalding hot water explosion With that being said there is some small but steady progress being done. The MSP430 has a some strange power requirements that are not properly documented. The VCC supply  needs to rise with >1V/ms otherwise it gets into an undefined state. That undefined state might also mean that some GPIOs are high, causing catastrophical failure. C...

This is one of those projects that just takes forever to finish, I must've started this 6 months ago. This part will describe all the hardware and various techniques used to figure out which signal goes where. Why do this? It's an improvement on the original firmware and an exercise in consumer product design. My goals will be listed in the second part of this post.